Fluid containment tank



FIG. 1 is a perspective view of a fluid containment tank, showing my new design;

FIG. 2 is a top plan view, thereof;

FIG. 3 is a front elevational view, thereof;

FIG. 4 is a bottom plan view, thereof;

FIG. 5 is a right hand side elevational view, thereof, the left hand side elevational view being a mirror image, thereof; and,

FIG. 6 is a rear elevational view, thereof. 

The ornamental design for a fluid containment tank, as shown and described. 